Observation of geodesic acoustic mode in EAST using Doppler backscattering system

被引：6

作者：

Zhang, X. H. ^{[1
,2
]}

Liu, A. D. ^{[2
]}

Zhou, C. ^{[2
]}

Hu, J. Q. ^{[2
]}

Wang, M. Y. ^{[2
]}

Feng, X. ^{[2
]}

Li, C. H. ^{[1
]}

Yang, X. M. ^{[1
]}

Sang, L. ^{[1
]}

Ai, J. Q. ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Comp & Informat, Hefei 230009, Anhui, Peoples R China

[2] Univ Sci & Technol China, CAS Key Lab Geospace Environm, Hefei 230026, Anhui, Peoples R China

来源：

PHYSICS OF PLASMAS | 2018年 / 25卷 / 09期

关键词：

ZONAL FLOWS; TURBULENCE; TOKAMAK; OSCILLATIONS; DISCHARGES; TRANSPORT; ROTATION; PLASMA;

D O I：

10.1063/1.5033432

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

This paper presents an investigation of the geodesic acoustic mode (GAM) using two poloidally separated Doppler backscattering systems in Experimental Advanced Superconducting Tokamak. Each system allows for the simultaneous measurement of turbulence rotation velocity and density fluctuations with high precision. With the Doppler backscattering systems, the GAM frequency, the symmetric feature of poloidal flow fluctuations, and the interaction between GAM and turbulence are surveyed. The results of bispectral analysis show a clear interaction of GAM with the ambient turbulence. A clear measurement of GAM in the envelope of plasma density fluctuations using Doppler backscatter system is shown, and the modulations of the turbulence perpendicular velocity on the density turbulence are correlated at two different poloidal position. Published by AIP Publishing.

引用

页数：9

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